A 24-year-old man partakes in a research study in which his hormonal secretions are plotted in relation to macronutrient consumption. The following graph shows the secretion of Hormone X as a function of duodenal acid exposure. The Y-axis is Hormone X secretion; the X-axis is duodenal acid exposure.

Which of the following is most likely to be seen in this patient as Hormone X levels increase?
A) Increased gallbladder contraction
B) Increased gastric acid secretion
C) Increased pancreatic bicarbonate secretion
D) Increased vasoactive intestinal peptide secretion
E) Increased water and electrolyte production by acinar cells

